Home / 28,289.89-39,041.25-15,714.64

Finding the Fourth Proportional to 28,289.89, 39,041.25 and 15,714.64

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Solution

The fourth proportional to 28,289.89, 39,041.25 and 15,714.64 is: 21,686.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,289.89 : 39,041.25 = 15,714.64 : x
  2. Step 2: Convert to fraction form
    28,289.89/39,041.25 = 15,714.64/x
  3. Step 3: Cross multiply
    28,289.89x = 39,041.25 × 15,714.64
  4. Step 4: Simplify right side
    28,289.89x = 613,519,188.90
  5. Step 5: Solve for x
    x = 613,519,188.90/28,289.89
  6. Step 6: Final answer
    x = 21,686.87

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.